The robber has hit locations in San Diego, National City and Chula Vista, with at least two robberies occurring at KS Wireless Stores, Chula Vista police Lt. Fritz Reber said.

A Boost Mobile store and Cricket Wireless store were also robbed in National City, said police Sgt. Alex Hernandez.

Authorities said the four robberies took place between February 25 and March 2.

Police described the robber as Latino, 20 to 30 years old with a slim build, weighing about 120 to 150 pounds. He enters cell phone stores carrying a handgun and demanding money and phones while holding the clerks at gunpoint, Reber said.

Anyone with information about the robberies can contact the Chula Vista Police Department at (619) 691-5151 or the National City Police Department at (619) 336-4411.